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利用人工模拟降雨装置,结合ICP-MX质谱分析测试技术,深入探讨不同降雨强度、降雨时段和覆盖条件下,粉煤灰草坪基质渗滤特性及其环境效应。研究结果表明:在相同雨强和时段条件下,有草坪覆盖的基质其渗滤液离子浓度和离子流失总量均低于裸露基质。在覆盖状况和时间段相同条件下,降雨强度对覆盖处理中的渗流离子浓度影响不很显著,但在裸露处理中则表现较为明显,雨强为90 mm h-1时大部分离子,尤其是草坪覆盖处理中的离子流失量达最大值。时段对渗漏特性也有一定的影响,总的来说草坪覆盖处理中离子浓度随时段的增加有降低趋势(A l除外);裸露处理中除K、Ca外,其余元素随时段增加浓度呈现增大趋势。此外,所有渗滤液均达到了国家规定的三类水质,部分甚至达到二类水质,不会对人类饮用水造成污染。
Using artificial rainfall simulator and ICP-MX mass spectrometry, the infiltration characteristics and environmental effects of fly-ash lawn matrices under different rainfall intensities, rainfall periods and coverage conditions are discussed in depth. The results show that under the same rainfall intensity and time, the total leachate ion concentration and total ion loss of the substrate covered by turfgrass are lower than that of bare substrate. Under the same conditions of coverage and time period, the rainfall intensity has little effect on the concentration of seepage ions in the covering treatment, but it is obvious in the bare treatment. Most of the ions at the rainfall intensity of 90 mm h-1, especially The amount of ion loss during turf coverage reaches its maximum. The time period also had certain influence on the leakage characteristics. In general, the ion concentration in the turf coverage decreased with the increase of time (except for A l); in addition to K and Ca, Trend. In addition, all of the leachate reached the third-class water quality stipulated by the state, and some even reached the second-class water quality without causing any pollution to human drinking water.